Yes, it depends on the market as there are differing rates.
And it depends if you are betting $10 or $10,000.
And it depends if you can get on with fixed prices at the corporates.
And it depends if you can pick up the occasional "odds boost" lol

It does also matter if you are betting the win market, or place market, or racing or harness.

And...
it is not uncommon to place a bet into the BF market that is many points above the crowd and for that bet to be picked up during the wild fluctuations..

There are also other complications... for example BF sometimes pays a 3rd divvie when the others don't but this BF 3rd divvie is lower then the tote 2 place divvie.

Would be interesting to see if anyone has long term stats on this from their own resources.