For the casual modeler, it's a toss up between Tamiya's and Hasegawa's in 48th. My pick would be the Hasegawa kit, but the Tamiya offering is a bit easier to build, overall.
The cons on the Hasegawa kit are the facts that the gear wells are WAY too shallow and you can't lower the flaps without cutting them. (The flaps and gear doors invariably came down as hydraulic pressure bled off after shutdown; if someone pulled the dump handle, that is...)
There's only one really big con to the Tamiya kit and that's the canopy. First, the clear parts are very thick; unforgivably so, especially compared to Hasegawa's and more especially for a Tamiya kit in general.
Second, the sliding portion is in two parts; the rail is solid gray plastic with the bubble being clear. It's not too horribly tough to get a good join of the two parts, but it is a minor PITA.
Also, the sprue attachment point on the bubble is in a very bad spot. Unless you're lucky (lotto-lucky) you're gonna wind up with a white spot where you cut the canopy off of the sprue. And this, more often than not, cannot be fixed. The windshield has a similar problem. However, if I'm not mistaken, the re-release of Tamiya's Stang with markings for the 'Doll' is the first release with re-tooled clear parts with different sprue attachment points. But in any event, the parts are still too thick.
One area that both are pretty equal in is decals. Most kit decals, in my opinion, are good for one thing: kindling for the campfire!
(unless they're specially-printed by Aeromaster or Cartograf...)
The Hasegawa kit has a bit more detail, especially in the cockpit and in areas of the wing pylons. But if you don't mind a bit-o-scratching then this is moot.
Anyhoo, if you don't care about
any of these things, then go with the Tamiya kit. I've built both Tamiya's and Hasegawa's Stangs and the Tamiya kit goes together alot quicker, easier and cleaner than Hasegagme's.
But the problems of the Tamiya kit, in my mind, outweigh those of Hasegawa's, so I'd personally go with Mr H. I'd rather have a shallow gear well and have to cut out the flaps than have a really thick and ugly canopy. Besides, cutting out the flaps is fun. (?!) And yeah, it has the shallow gear wells, but I can put the model on a base...
Fade to Black...