We have been offered almost similar rates for Treasure Island Tower Suites,regular Venetian suites, regular Bellagio rooms and Aladdin resort rooms and we are confused,which ones should we pick?

What do you want...great service, largest room possible, best view possible, best casino, best on site restaurants, best pools, or what?

None of these hotels top every category (in the same price range) so you have to tell us what's most important as regards your priorities.

gee, jj, wouldn't it have been just as easy to tell us which of those hotels has the best in those categories you mentioned? Then there'd be no need for additional posts back and forth.

JJ is right: what do you want? Luxury? Then opt for Bellagio. Have kids? Treasure Island or Aladdin are more family friendly because of the hotel themes, pirate show and the mall in Aladdin. (The Venetian has a mall as well, but it has more high end shops.)

I've stayed in a Treasure Island suite and an Aladdin room. Between those two, I'd go back to TI because the room was more plush and comfy, done in white and beige and had a view of the pirate show too. Aladdin's room was nothing special though had a large bathroom.

One suggestion is to call each hotel and ask for the room size. If you are staying 4 to a room, that might be the deciding factor.

Dearest "x":
Having posted answers on this board for years, I find it's a colossal waste of time to provide oodles of info which the original questioner is not interested in.
If he only wants a large room then all my input about Bellagio would be a waste, now wouldn't it (since it has the smallest of the above rooms)?

Instead of sniping at other people who are trying to be helpful in an efficient manner perhaps you should just keep quiet. Your post added what to this thread?
(And I'll gladly add something useful myself if George writes back).

Sorry for not providing enough info.my fault!We are mostly interested in a nice room,we understand that Aladdin and Treasure Island are not luxury hotels but the suites might be luxurious and big compared to the luxury hotels of Bellagio or Venetian's regular/standard rooms.

George:
For identical room rates, a tower suite at Treasure Island is your best choice (with one caveat....see below) IMO. Much larger than a standard room at Bellagio, and almost as nicely furnished. His and hers baths. Some extra living space.
Bellagio's standard rooms are nice, but they're not overly spacious (by LV standards) at about 510 sq. ft.
Venetian's rooms are a little larger than Bellagio's, but I'm not overly impressed with Venetian beyond the rooms. I don't care for the casino, the service is not commensurate with the room rate, and the whole place just seems cookie cutter to me.
While TI is not in the same league as Bellagio for hotel amenities, service, etc, the casino is pleasant, restaurants are decent and I think you get what you pay for there.
I'm not familiar with Aladdin's suites, though one of my business partners returned from staying in one recently and liked it. Aladdin's having major financial problems so I'm expecting service is a bit spotty. But it is new, location is good, and if you're on the adventurous side and like a bit of risk (wouldn't THAT be unusual among LV travellers?) Aladdin might actually prove to be your best choice. Suites there are definitely better than the regualr rooms, which are OK but somewhat cheaply done.
If you like sure things, the suite at TI is a good choice. The suite at Aladdin could be worth checking out....personally I'd call the reservationists and ask them for plenty of details about the suites there if you're leaning that way. Just my .02

OO! Cat fight between JJ and XXX...REER! But then JJ covers his butt in the end. Nice follow through JJ.