I have both - Athlos 100% better glass. Its what’s on my western hunting rifle. I have the Element Titan as well and find the glass very comparable between the 2, but the Athlon is over a pound lighter.
Could be quite a while before that comes back. Athlon said they may have trouble continuing with that scope. I’m switching over to the Element Titan for my “go-to” but it’s a bit more money.
Both are good scopes. The Element has more precise tracking and in my opinion better glass quality. Helos is lighter weight if that’s what you want.
If I had to make one critical shot at 1000 yards, I’d take the element titan for sure. If I wanted a lightweight but very capable hunting scope I’d grab the Helos.
The Titan is solid, and for the money is a great scope. But the Athlon is lighter, cheaper and a much better value. IMO, the glass on the Titan isn’t that much better.
If, like Jim said, the Helos is out of stock and not available, I’d look at the Titan if you can manage the weight. If not, check out the Athlon Ares 4.5-27. Its about $100 cheaper than the Titan if you can find a deal, otherwise about the same price and a full pound lighter. The Ares is a step up in glass quality over the Helos.