X201 i7-620M vs X201s i7-640LM

[Thinkpad4by3]

Which one is faster, the 620M or the 640LM and if I had the choice of X201 v. X201s which one should I pick?

[ZaZ]

Which one is faster, the 620M or the 640LM and if I had the choice of X201 v. X201s which one should I pick?

On paper the 640 is faster, but that's only if you're running them at or near capacity, so I would pick the lesser priced one, as it'll offer better value.

[RealBlackStuff]

X201s (where s=slim) is slightly thinner and lighter than X201.
There is a screen option WXGA+ (1440x900), most often on the X201s.
Lids with that WXGA+ do NOT have the webcam option, only WXGA (1280x800) has that.
Performance wise X201 and X201s are the same.

[apojoga]

I would primarily worry about the heat/noise situation. I don't have personal experience, but I hear the X201 likes to heat up with the i7; the X201s even more so on account of the smaller case.