teasel vs bristly oxtongue

I've had teasels in my garden for years but have only had bristly oxtongue (although seen many out and about) since I moved late last year so I now have the 2 next to each other and thought it would be interesting to compare the leaves. Bristly oxtongue (Helminthotheca echioides) left, teasel (Dipsacus fullonum) right.

closer view of the leaves

bristly oxtongue

teasel

closer view of those teasel prickles

teasels that have self-seeded around the houndstongue (now spent after blooming earlier in the summer)

bristly oxtongue closer views