If that Stryker is M2, I'd keep it. S60V vs M2 is no comparison as far as edge retention.
Otherwise, another difference is that the Boa is an assisted openers, the Stryker has a thumb disk. Both are liner locks. The Boa has aluminum handles and the Stryker has G-10.
Sharpening a Stryker can be difficult, as a tanto edge can take practice to get right. I have the Serrated version in M2, which pretty much makes 3 blades to sharpen (tip, belly, serrations) on 1 knife. As you already have one, you probably know what I mean already.
If you like a knife with a belly, and a little recurve, the Boa would be more your speed. Both are about the same price.