Its not assault SSR, cause some SSR dont have the 16%, its assault large, assault medium and assault small, assault large (usually ++) is 16% at maxed, with a base 6%, assault medium (+) is 13% at max and has a 3% base and assault small has no + and its 10% at max, all of them gain 0.5% per skill lvl.

Pride is 0.5% per skill lvl too so at max they give 10% too, the difference being that they give 10% at 100% hp, with that 10% increasing the less hp you have until a max of 29% at 5% hp, the breakpoint between them and assault large being 70% hp.

Finally, 3% may seem not worth it cause its a tiny difference, but that 3% is huge when you have a lot of stats, that on top of most SSRs having way more stats (atk and hp wise) compared to simple SRs, so its not "just 3% more", knowing these values you can calculate the assault value of your grid yourself.