As an apartment dweller, micing up amps isn't really an option for me. Over the years, I've learned a couple things about guitar tone and what works for me.
Years ago, I found the POD products were pretty neat in the context of recording. Back then the plugs weren't up to snuff in comparison, and the Line 6 software allowed a lot of control within SONAR.
I eventually moved away from the POD's because I prefer the sound of a real amp, and wasn't recording much. Getting good amp tone in an apartment was a different journey...
Having gotten back into recording after some years away, computers are much more powerful, and the sims have improved.
I picked up Amplitube 4 and TH3 on sales in the last year at good prices. I prefer Amplitube for a number of reasons, not the least of which is their models don't put master volumes on amps that don't have them in real life. I do like TH3 in that they include everything as opposed to Amplitube's death of 1000 upgrades.
The two products do sound different. I like the Marshalls in Amplitube better, but found I like the Big Muff in TH3 better.
In the end, I like sims because they work better with my workflow. I'm not a professional musician, I do it for fun. I can quickly come up with something that is very close to the sound in my head, and concentrate on the performance.
The options available today are amazing compared to when I go started in the '90's.
I'm pretty sure that micing up a real amp would sound better. But for my needs, the sims are fine, and solve some of the problems I face with micing.
Sorry I can't help with how good Bias is. For me Amplitube and TH3 are adequate. I am interested in the Helix Native, and will probably get it if/when it goes on sale.