I'm in both, as well as subscribe to Eastmans and Western Hunter. I put in for 7-8 States a year, mostly building points, but I've gotten lucky a couple times for great tags. Subscribed to HF for the past 7 years and GoHUNT for the past year. They're quite different and compliment eachother in many ways. HF is very specific for which zones produce the highest quality animals. They stack rank the top zones and give you another ten zones in the next level down (in terms of trophy quality). They give draw odds. They don't give any info on at least 50% of the zones in any one state. For the zones they do cover they give some details on where to go, but literally only a sentence. They're very focused on the top units for trophies. But honestly, not much changes year to year in terms of info. The top zones one year are generally the top zones the next year. They're mainly focused on the draws (best = hard to draw units) vs hunt research or planning. Although they do give different details, even for "opportunity" hunts. They generate a lot of income from their own raffles. The marketing for those raffles can get annoying (yet ironically they don't give the draw odds on those raffles). Their guide recommendations, at least for my limited sample, have been pretty so/so, almost bad. It's always a crap shoot with guides, but I expected better quality since they recommend them and supposedly vet them out first. They also don't seek feedback if you did use a recommended guide, which seems odd to me. If you draw a good tag, they will give you the contact info of other guys who drew that tag in prior years. Other hunters are generally pretty helpful because they probably won't hunt that zone agian any time soon given draw odds, so they give up good info.
GoHUNT doesn't give any zone recommendations, but has a lot more info on every unit. It's pretty high level info., but useful if researching new areas. Based on their info. it's often hard to determine if one zone is better than another. Good for general research, especially if OTC. Their content or articles are generally much much better, as it's more informative vs just hunting stories. HF is mostly state draw recommendations and stories with no real info. I'm personally tired of just hunting stories with no real insights, so I learn a lot more from GoHUNT and find it more engaging. GoHUNT is 100% online info, where HF is mostly high quality print magazine. GoHUNT has some great interactive tools such as topo and satellite maps with hunt zone overlays. Makes it very nice for research. I like their info/process on landowner tags better. Guides don't appear to be really vetted to reach "recommended" status, but that's a guess.
I'm sure there are more differences that I'm missing. Given how much you probably spend on hunting each year, do both or divide it up with a couple buddies. If looking to only put in for the best units and don't mind waiting a lifetime, then HF is better. If researching new areas or looking for good content (how to's, gear reviews, etc) then GoHUNT is better. If GoHUNT gave draw odds and recommendations then I would probably drop HF.
For a straight up magazine I like Western Hunter the best, although GoHUNT's content if generally on par or better. Eastmans, for me is getting less and less interesting over time for content, zone info and my personal process for planning.