Yep, see my other deal.
Now cheaper at CCL. COLD
Looks like the price has risen slightly to £109.65, edited accordingly.
According to a basket of online reviews, I'd say they were roughly even overall - the EVO is a bit faster in some metrics, the SX8200 in others. I very much doubt there's any perceptible difference between the two in normal day-to-day usage.
https://www.techradar.com/uk/reviews/adata-xpg-sx8200-ssd Not to worry the 970 evo is the faster drive, so your not losing value in your purchase.