I have a 23DVCC and have ridden on a 25MVCC. As the prior poster says, the weight difference makes the rides similar, maybe giving a nod to the 25. Sometimes you just can't beat mass!
However, the BIG difference is space. Wow! The consoles are the same (i believe) and the extra foot of beam and two feet of length translate into a HUGE amount more room. It is a BIG 25. As also said prior, I wouldn't be towing that sucker much. It's simply on the edge of easy tow-ability.
As for being able to be single-handed, I have no idea. Didn't jump out as an issue. Also, if I remember correctly, the 25 I was on had a single 300 for power and was fine.
The other thing about the 25 that stood out to me was how dang simple and plain the boat looked. What I love about Parkers is their no-nonsense approach to outfitting a boat. Easy to fix, easy to clean, etc. For some reason, the 25 is just big enough that this simple look bordered on weird looking. parker lovers are going to love it. Others will see a stripped down, work boat.