Yes, very much so...and no, not really.
Sculpey is softer. Fimo is harder. Both come in different grades, with various properties though. I think the stiffer Sculpey is called Primo...or Premo...I forget. The end results after baking are not too big, fairly similar for most intents and purposes. You can\'t keep your fingerprints out of Sculpey or Super Sculpey, it\'s much easier to use Fimo as far as that goes BUT it takes you that much longer to prepare the Fimo and make it soft enough to sculpt (you need to kneed it, mix it, warm it up) and it\'s that much harder to mix/blend colours.
Like all sculpting mediums, preference is subjective. Sculpey is sort of sandy/muddy and Fimo is sort of waxy/rubbery...which is misleading to say, since there is no grain or memory to speak of in either, they\'re both as smooth as can be and will stay where you put them. I think I like Fimo more but not enough to pay the extra for it, it\'s anywhere from %50 more up twice as much as Sculpey here. Hence I buy Sculpey.
Sculpey is alot easier to find, especially if you get serious about using it, you can get the larger 1-10 pound blocks of clay at any art store, which are WAY cheaper than the little 2 ounce blocks by weight. Fimo 2 oz blocks can be found anywhere but the bigger packs can\'t. At least around here anyway, Canada. Of course, noone reading this is shy about shopping online so that\'s a non-factor and fingerprints aren\'t a big deal for people using sculpting tools...
You can find all the scientific data on their websites about strength, density, flexibility, tolerences etc.
