Sometimes yes, sometimes no........
A great mix for a small plot is plotspike forage feast. Wheat, oats, winter peas, clover, chicory or brassicas too I think. Awesome little mix. If I were to make 10 acres of it, going to a local ag coop and buying what you can will save money. The clover blend plotspike has too I think is a good deal. If you're seeding clover in a new spot, their seed is not coated with rhibozomes. Just some basic red coated clover would do it. I have bought that plotspike forage feast, then make it spread in a bigger plot with a bag of feed oats and a few lbs of clover. Hard to beat that $35 price buying them separately.
My local farmers co-op has alot of decent variety of seed for a fair price. All 3-5 bucks a pound range. Daikon raddish, a few types of clovers, turnips, canola, corn, soy beans, and they have bags of winter rye. I like that they have both coated clover and uncoated clover. I like uncoated clover for frost seeding, so the birds cant get it so easily.
Feed oats work great for me. I test germinate them before planting. IF you cant find rye, oats work. I live in NY. Those oats live until you get a few 20 degree night, or one night before 15.
Those fancy dancy so-n-so on TV hunting show mixes..... Not my cup of tea. Improved varieties aren't that special. There is very little in those bags you cant buy cheaper.
The one exception is that imperial clover. There is an improved variety that lives several years with monthly mowings and makes seed. Haven't found a clover that beats it yet compared to that Ag co-op. There's alot of other basic clovers in there too. I still think that bag is worth it for an acre or less.
The one down side to mixes, larger seed should be planted deeper than little seeds. It's nice to spread oat, wheat, peas, or rye, stir it in a bit with what implement you got, then put the small seeds like clover, raddishes, chicory, alfalpha. or grasses on top.