I'm not too sure about that. Having flown both Yellow and PICA Spitfires I would say that whichever is the lightest will fly best.
For a warbird the Spitfire is a delight to fly, the tricky part is the landing...

Both the PICA and Yellow Spitfire suffers from the omission of the rather characteristic "gull wing" in the rear centre section of the wing. This is a pet peeve of Spitfire aficionados, but most people won't notice. From a scale point of view Brian Taylor's Spitfires are the best, no doubt about it.

The Moki will provide scale like power for both the Yellow and PICA Spitfires if kept light. The Pica kit has a lot of potential for weight saving measures and could quite easily be built a couple of pounds lighter than the Yellow Spitfire.