The funny thing is that there was a time when the 7.62 NATO rifles were considerably less valuable than the .303 versions!
In my opinion, the 7.62 NATO Enfields are more for shooting, as they lack any kind of history other than as Police rifles. They are interesting in their own right and the fact that the last-produced Enfield variant was based on the #1 action and not the #4 is pretty fascinating to me. They are likely stronger than the .303's and there is no doubt that the rifles are safe and well-made. The finish isn't so good, but that isn't a big deal.
The trouble is that surplus ammo is getting scarce. While there is certainly more variety of 308 ammo on the market, there isn't really that much of a price advantage anymore. As such, I would rather get the .303 versions which have greater historical value over the .308 versions.
Ash