It does feel very different. I had a brief try on it today (I forgot I could play it freely since I pre-ordered HL2 Silver ages ago
), and it's similar, but it does have some distinctive differences.
It's more of an automatic, sprayers game now. The rifle classes feel a lot weaker than the original version. They don't seem as accurate standing up as they are in 1.3, there's no pistol for backup when you miss, you can't stab/smack them with the gun, the ironsights feel next to useless considering how quickly everyone moves, and the grenade-launcher doohickey makes your nades less effective really (since you can't prime + throw them like all the other classes can).
Of all the maps, I actually thought Argentan was the best of the lot. The remade maps just don't quite seem to suit the new way DoD:S plays, and they just end up as spray fests, but Argentan actually made you need a few riflemen on the team, and balanced the classes more.