To bust this mystery I recently bought 5 different brands of strings for my 808 TE, all 12's gauge to find out which work the best and last the longest. I didn't try elixir though!
I came to the result that GHS strings (8 EUR) and Martin Eric Clapton Choice (4 EUR) fit my playing and my guitar very well. GHS lasted longer and had a nice feeling from the start, in fact they lasted very long
The Martin EC Choice sound really good on my guitar but tend to lose clarity after a week of daily playing, but anyway; they're cheap and sounded softer from the start (preferred!) as all the other strings I tried.
The other 2 brands weren't bad at all but they were all above 4 EUR and didn't make it for the price. In the end, I can recommend to buy several brands and try them out, it's the best way to know. Hope this helps!