no difference; indistinguishable; same thing
Used to say that two or more things are essentially the same, with no meaningful difference to choose between them. Often appears in the pattern 〜も〜も選ぶところがない or 〜と〜は選ぶところがない.
There's nothing to choose between these two proposals.
Their abilities are so similar that they're practically indistinguishable.
Variant using 所 instead of ところ; less common but still seen.
Literally 'there is no place to choose', from 選ぶ (to choose) + ところ (place/point) + がない (there is no). The expression is idiomatic and its origin is transparent.