Comment by Someone

The 6502 is from 1975, the 6809 from 1978.

The 6800 (from 1974) could have been competitive with the 6502, but (https://en.wikipedia.org/wiki/Motorola_6809#6800_and_6502):

“The 6800 was initially sold at $360 in single-unit quantities, but had been lowered to $295. The 6502 was introduced at $25, and Motorola immediately reduced the 6800 to $125. It remained uncompetitive and sales prospects dimmed. The introduction of the Micralign to Motorola's lines allowed further reductions and by 1981 the price of the then-current 6800P was slightly less than the equivalent 6502, at least in single-unit quantities. By that point, however, the 6502 had sold tens of millions of units and the 6800 had been largely forgotten.”