i started to like the grainy look after a while... and yes, the weapons in this add-on were the highlight for me... the automatic combat shotgun, the sawed-off (which took out vehicles in 2 shots!!), the grenade launcher, the automatic pistol, and the pipe bombs... i used all of them all the time... not the sawed-off so much though once i unlocked the other one...
The sawn off was so-so, its only advantage was being able to use it on a bike, but I soon traded it in for the streetsweeper. Pipe bombs aren't much different from 'nades and the automatic pistol was nearly identical to the micro-uzi. The grenade launcher was probably my favourite for its uniqueness.
The filter took a bit of getting used to, especially in the dark clubhouse. I'm sure TBoGT has a filter too, the contrast between light and dark seems to be more noticeable.
Yeah i think TBoGT has a bit more of a higher saturation filter. Not so much that it is really noticeable, it just seems more colourful like Vice City.