Help Choosing an Oven : Forced Air or Multi Convection

Hello,

I have been trying to choose between the following Whirlpool Ovens (to match purchases of hood and hob) :

Multi-function Single Oven with Grill AKP 206/IX

http://www.whirlpool.co.uk/-{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}5B857720615500{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}5D-100239/857720615500/

or

Circa Fan Single Oven with Grill AKP 207/IX

http://www.whirlpool.co.uk/product-info-1/oven-2/single-oven-3/-{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}5BAKP-207_IX{e5d1b7155a01ef1f3b9c9968eaba33524ee81600d00d4be2b4d93ac2e58cec2d}5D-100241/857720715500/

From the specifications of each oven and some research on the web one uses Forced Air Convection which doesn’t require preheating of the oven and the other is a multi-function oven which can allows use of the grill and oven at the same time.

They can both be found for £200 give or take a few quid.

I’ve only ever used an oven for grilling and cooking. I’m not sure if the extra multi functions of the AKP 206/IX would be of any benefit to me but I imagine there could be considerable savings in running costs from not having to preheat the oven with the AKP 207/IX?

Any advice or preference of which is the better oven are most welcome.

Thank you.