I messed up. I need to know if I did any harm.

Yesterday was brake fluid day. I changed the brake fluid in our 1986
Syncro Westfalia and our 1991 Toyota MR2 Turbo. I had a liter of DOT3
and a liter of DOT4. I didn't look in the manuals and I should have. I
assumed, incorrectly, that DOT4 would go in the MR2 where higher braking
temperatures were likely and that DOT3 would go in the Syncro. I was
wrong. I had it backwards.

Now,  have I done any harm? Must I redo the job with the correct DOTs in
the correct vehicles? If not, what are the consequences of leaving it
this way?

Any and all advice (and wise cracks) accepted.
Larry