Frotality said:
ME1's less meaningful but larger variety of choice gave it fifty-billion times more replayability than ME2's barely existent choice. ME1's item system was broken, but at least it existed, and flawed as it was gave you at least a SENSE of progression and variety; ME2 had a starter weapon, a second one that was universally better than the stater, and a specialist one universally better than either.
Each weapon in ME2 was different and honestly, except a few cases, which weapon was "better" was largely a matter of taste and preference. The starting pistol is better for spraying a lot of bullets and cover fire, whereas the carnifex pistol had more powerful shots and favored a player with better accuracy. I think of them like standard semi-automatic pistol versus a magnum revolver. Fewer shots per clip, fewer shots in general, more bang for your buck, but not necessarily "Better".
The SMGs were similar. Each one had different firing patterns. The starting SMG fired 3 shot bursts with a slight delay between them, but had a relatively large clip. Something like the Locust (the gun that killed two presidents) has a very small clip and does less damage per shot but can fire individual rounds (basically 1 shot bursts) with no delay between them, so you can auto fire all 20 bullets. The starting SMG is better if you like to just press the trigger, the 3 bullet burst fires faster then the locust, but the locust gives you more ammo control, and doesn't leave you with any dead time between bursts.
Shotguns, different shotguns had different clip sizes, which I found made a huge difference. Sure the unlockable shotgun had the best damage in the game, but it had one bullet clips. Meaning if you weren't ontop of your reloading, you'd often charge in with no bullet in the clip and waste a charge and perhaps put yourself in hot water. The other shotguns had 3 or 5 round clips, so there was less reloading, and you almost could always have at least one bullet in the clip and not be caught with your pants down.
I haven't played a soldier, but I imagine Assault Rifles are similar to SMGs.
Sniper Rifles do have "strictly better" versions, but even saying that, there are two styles of sniper rifles and they can both be very effective. The starting sniper rifle and the super powerful widow are 1 shot sniper rifles. The other two (1 from Thane's recruit mission and 1 from DLC) are rapid fire sniper rifles). The Widow is strictly better then the starting sniper rifle, I'll admit that (It does more damage, has more rounds overall, it's just a better gun), and I'd imagine one of the rapid fire sniper rifles are better then the other, but to choose between the styles of sniper rifle, and there's an actual choice there. I played through the game once with each type of sniper rifle as an Infiltrator, and had an alright time of it both ways.
Armor-wise, unless you download the Kestral Armor, there are LOTS of valid choices for armor, depending on what you want to do. If your a soldier with the 50% health damage reduction version of Adrenaline Rush, stacking health might be better. If you're a sentinel or vanguard, with their built in barriers that are dependant on shield strength, boosting your shield strength might be better. The Kestral Armor set overall is strictly better then pretty much anything else you could use, but other then that there's great variety and you feel like you're actually building an armor set to suit your tastes.
I *NEVER* in the 10-11 times I've played through Mass Effect 1, had that level of choice in my gear. Never. It was always "which has the best damage", until I could get specter gear, and then it was "Specter 7 or Specter 10?" and the answer of course is 10. Armor-wise, it always came down to colossus or Predator LMH, and the answer was almost always colossus. Mods might change things up slightly, but even that was just about min/maxing damage and damage resistance (so it usually came to ablative armor for armor, and scram rails balanced with frictionless materials for most weapons, with double scram-rail and explosive ammo for sniper rifles) To do it any other way is just silly, you're gimping yourself entirely by doing it any other way for no gain other then "I'm different, yay!"
ME2 has real choice in its gear, ME1 has fake choice.