In short, the V-series is the lowest performing mobile chip currently offered by AMD. That doesn't mean that it is bad either. In comparison to a Sempron or Celeron processor it is faster.
The Intel 6th Generation i7 is much better than the AMD Athlon.
An AMD processor comparison chart can be found on the AMD website under products. There is also an AMD processor comparison chart located on Wikipedia.
Intel is a good processor, usually quite fast and powerful. AMD also a good processor, difference between them is that an AMD is easier to overclock (make it run faster than it should) AMD's are made to be overclocked. No real advantage or disadvantage just matter of opinion, and what you want to do with it.
Its not the fastest, but the AMD 64 processor is still fast.
Assuming you're talking about the AMD Athlon II X2 250 and the X2 265, yes. They both run on Socket AM3, and are fully interchangeable. Good idea on the upgrade, but for $1 more on Newegg, you can buy the AMD Athlon II X3 440, which is a triple-core processor on the same socket. A dollar more for a whole extra processor? Sounds like a good deal!
It was fine eight years ago, but is long obsolete by today's standards.
Normal processor, for low-cost category.
amd is the best
AMD
Amd is just awesome then intel.
Probably just as good for browsing internet or checking emails. It's a single core processor compared in performance with the old AMD Sempron 754 pin CPU family of processors.
Intel, by default, is a better processor for people who play games frequently and multitask. AMD is good for multitasking, and not so much for games, however I personally have an AMD and I can run 2 servers up at once and play Minecraft at once. AMD is good for cheaper use, Intel is good for people who can afford it and built for games. Personally, I'd say AMD on this one, unless the GHz speed level is lower. Although - it is your choice. I'd recommend the cheaper one on this end, unless you can afford the more expensive.