I have heard both. Either are quality speakers and extremly good buys but my preference lies with the Focal 814v's. I really dislike using terms like "warm" to describe sepakers because its all subjective, but I guess it is the best we got. Sort of like describing how a strawberry tastes - wet, tart, sweet, juicy, luscious etc, etc. You get the idea - there is no other way to do it.
That being said, to my ears I would not call the Focals warm at all. The KEF IQ90's sounded more warm to me. The Focal's were much more "livelier" and "snappy" while the KEF were the ones that sounded laid back. Not to knock either - all the more reason to listen to both if possible. However if I could not, I would pick the Focal 814V's in a heartbeat especially at the deal that accessories4less currently has. Not only do I prefer the sound but that gorgeous piano black finish isn't too bad to look at either. Good luck in your decision - at the prices they are selling for, you really can't go wrong with either.
Marantz PM15S2 LE, Oppo BDP-103, Simaudio Moon 100D DAC
VPI Traveler V2 with an Ortofon Rondo Blue and Simaudio Moon 110LP, Technics SL-1400 with an Audio Technica AT-14sa and Pro-ject Phono Box S
Dynaudio Focus 260's, Rel T-1 and a Panasonic TC-P54S1.