I've got both. I ran on carpet last night for first race meeting with Cougar. It is more nimble and flies better than my X6. It seemed to generate loads of grip even with well worn tyres. I'd previously ran the same tyres on my X6 and understeered rotten. To be fair to the X6 its probably down to set-up more than anything. Outdoors the X6 has always been really good in all areas. I love mine. Thats why I've kept it. Cant wait to go outdoors with the Cougar, but I'll have my X6 with me just in case its needed. Be assured that the Cougar is a brilliant car. I'd reccomend it to anyone.