About 600 investors attended a luncheon with Twitter Chief Executive Dick Costolo in New York City on Wednesday, part of a roadshow for the IPO that seeks to raise up to $1.6 billion (997.2 million pounds) for the loss-making social media company.

Closely watched by Wall Street and Silicon Valley, Twitter's relatively conservative offering has differed from Facebook's $16 billion IPO in a panoply of ways, from its vastly smaller deal size to a decision to list on the New York Stock Exchange over Nasdaq.

"It definitely was different than when (Facebook CEO Mark) Zuckerberg came through ... It's the right kind of buzz," said one fund manager who met with Twitter on Monday.

"With Facebook, the buzz was just stupid," said the manager, who declined to be identified because he was not authorized to speak to the media.

Twitter last week said that it would price its IPO shares at $17 to $20 a piece, valuing the online messaging company at up to about $11 billion. That is less than the $15 billion that analysts had expected, and far below the $100 billion valuation that Facebook received in its IPO last May.

However, Facebook had reported an annual profit of $1 billion and revenue of $3.7 billion before it went public, whereas Twitter reported a net loss of $79.4 million on revenue of just $316.9 million in 2012.

On the 36th floor of the Mandarin Oriental Hotel in New York on Wednesday, Twitter's executives and bankers, clad in dark suits, pitched investors over plates of pesto chicken salad and raspberry tart.

Security guards quietly guided two guests per investment firm to their seats inside the cavernous ballroom overlooking Central Park. Missing were the snaking lines, heavy police presence and media frenzy that characterized Facebook's 2012 road show, which Zuckerberg initially attended in a hooded sweatshirt and sneakers.

Twitter also asked attendees to submit their questions beforehand, which is a rare practice, one investor said.

"I was expecting a lot of fanfare, like a wedding but it's very nuts and bolts," said Akram Yosri, a managing partner at 3i Capital Group. "I like that very much. They're still in early stages of growth."

VALUATION

At the upper end of its IPO price range, Twitter would be valuing itself at 20 times trailing 12-month sales currently, and about 17 times at the lower end, according to Reuters' calculations from Twitter's IPO filings. But its outstanding share base could swell by tens of millions of stock as holders exercise options and restricted stock units, inflating the valuation.

In comparison, Facebook trades at about 24 times trailing 12-month sales and LinkedIn Corp at roughly 30 times.

Fund managers viewed Twitter's price range as relatively conservative, basing their perspective on earlier guesses that had pegged the company's range as $28 to $30. Twitter itself mentioned that it had internally valued its own stock at $20.62 as recently as in September.

That has attracted some investors who expect Twitter's shares to climb after they begin trading on the New York Stock Exchange on November 7.

Twitter "is getting a really warm welcome from people," said Scott Sweet, CEO of research firm IPO Boutique.

"Of all the individuals and institutions I've talked to - which include multi-billion dollar hedge funds - no one has said they aren't playing," Sweet said.

Facebook's float was marred by an 11 percent drop in the stock on its second day of trade and successive declines over the next few months as investors questioned the company's ability to grow revenue through mobile devices.

It didn't help that, before its debut, Facebook's underwriters raised the size of the IPO by 25 percent and also hiked the price range. Finally, technical problems with Nasdaq trading systems delayed the start of trade, sowing confusion amongst nervous traders.

It took over a year for Facebook shares to reclaim their IPO price.

Another investor, who owns shares in Facebook and LinkedIn said his firm is approaching all the Twitter underwriters to ask for a 10 percent allocation, with the hopes of getting between 1.5 to 3 percent.

"It's a stupid game that is played ... if you can get what you want, then you don't want it," he said.

Some investors say they believe management has learned from Facebook's mistakes and are pricing the deal in a more conservative manner.

"It's the anti-Facebook" said a second fund manager, who also spoke on condition of anonymity and is planning on meeting with management later this week.

Investor interest is expected to build as the roadshow proceeds. After stops in Boston, Chicago, San Francisco, Los Angeles and Denver, the roadshow ends in New York next week with pricing scheduled for November 6 and trading on the New York Stock Exchange to commence a day later under the ticker symbol "TWTR."

The company founders "are gazillionaires already. I think they're not going to want to spend the year after the IPO dominated by the argument about 'why we the IPO,'" the second fund manager said. "Life is short."

(Reporting by Jessica Toonkel, Olivia Oran and Nicola Leske in New York; Additional reporting by Gerry Shih and Edwin Chan in San Francisco, and Ross Kerber in Boston; Editing by Tim Dobbyn and Tiffany Wu)

By Jessica Toonkel, Olivia Oran and Nicola Leske

Stocks treated in this article : LinkedIn Corp, Facebook Inc