The setup you mention is VERY common amongst Bobcat owners. On my Bobcat I originally used flapperons when the aircraft was being flown by a RAM 500 ... but when I moved up to a P120 I found that landings with flapperons were very tough at my home field because the much higher residual thrust of the P120 (sompared to the RAM 500) combined with the steep approach angle to clear the trees meant that the aircraft was always coming in too hot. By putting the ailerons up rather than down, the resultant nose high attitude of the aircraft allowed the underside of the wing to produce much more drag so that I could slow the aircraft down more easily and even carry power on final(s).

As Sean has pointed out, being able to carry power during the landing has definite advantages for turbine powered models - turbines tend to spool up much slower from idle than they do from e.g. 1/4 or 1/3 throttle - so if you can make your approach under higher power then you get a quicker response if & when you need to add more power (e.g. for a go-around).

A minor downside of putting the ailerons up is that this raises the stall speed - so if you are used to the stall speed of the model with flapperons, then you switch to putting the ailerons up rather than down, you should probably add a few knots safety factor until you get used to the new setup.

Gordon