Board Thread:General Nerf discussion/@comment-30049823-20200203190207/@comment-30049823-20200317033913

There are a couple tweaks to the outer shell between them, but the molded-in copyright year and manufacturer info is identical. The interior has differences in color and construction of the pusher arm and some other bits.

Looking all over the internet for any info on these things, the Washington Post's Nov 1995 list of dangerous toys puts the TS10 at #7 and the Seattle Times a month later ranked it #10 on its dangerous toys list.

Retail price of the TS10 was $24.99, for future reference / Wiki page.

Apparently the TS20 never made any dangerous toy lists, in spite of having twice the ammo capacity and triple the size, making it suitable for clubbing your baby brother right smack in the face with.