Dont listen to the nay-sayers that think a 1/2 ton is just a car with a bed and incapable of towing.
20-years ago we were all pretty comfortable towing 7k with half tons.....and they have came ALONG way.
A 20 year old 3/4 ton truck vs a modern 1/2-ton.....no comparison. The modern truck trumps the older one. Bigger/better brakes, better trans, more power, etc etc etc.
^^^ winter deere touched on the point I was gonna make after reading this thread....
Why is it okay for a 20k tractor to tow 4x its own weight?
Or a modern dually that weighs 8-9k can tow 3x its own weight easily
Yet a 5k truck cant tow 2x its weight

give me a break already.
But Im sure there are some on here that think you need an F450 or F550 to tow your 10k load....lol
And everyone wants to make the same old argument that "its not about power its about braking"......
Well let me tell you....it dont matter how heavy the trailer is. The trailer has its OWN brakes that account for its OWN load. A proper setup with proper brake controller....towing a trailer you should stop just the same as if the trailer wasnt back there. PERIOD.
This non-sense of people wanting to say "what if". Like "what if the trailer brakes fail"......Well we can play the what-if game all day long. What if you have a tire blow? What if a tie-rod snaps and you loose steering? What if the truck brakes fail? What if the engine blows and you have no power steering or brake boost? You simply cannot plan for all the what-ifs....just maintain your equipment.
But I will say....IF trailer brakes do fail.....Id rather have 10k behind a 5k truck (2x) than have a 25k or 30k behind a 9k truck? But somehow thats okay right?
Bottom line.....dont matter what you are towing....if trailer brakes fail you are in for a bad day. And simply having a 3/4-ton truck that only weighs ~1000lbs more than a half ton is gonna be little comfort when when you have 10k pushing you down a hill.
But of course its all options too. You can equip a f150 4x4 crew cab and be at 5900# curb weight. OR you can get a 2wd regual cab F250 and be about 300# lighter.....so saying go to the heavier truck....maybe the F150 is heavier? And if the small difference in weight between F150 and F250 really made that much difference....why the push to make trucks lighter? Like aluminum body?
Now with regards to the toyota vs F150......I havent looked up specs on either....but assuming the way you want them optioned they both have the towing capacity and payload to handle the 10k you want. And if thats the case.....put on the blinders and dont look at the brand. Go drive them both and see which one you like best. Which rides the best, handles the best, is the most comfortable, etc etc. Thats what my decision would come down to