You may may like Foma Fomatone Classic VC FB Cream Base Warm Tone, I've used it a number of times. It's quite nice. No two papers are the same, and I can't imagine how you will be able to judge the results without trying it. It's not like there's a lot of choice anymore. I agree Ilford warm tone looks like faux warm tone. Freestyle has an Adox warm tone paper listed. I have no experience with it.

In the past I got interesting results putting neutral papers in a warm tone developer. They usually need a bit of selenium to get the green out. When I was printing for a lab, I found that Oriental looked best in a Dektol-like developer. I don't think it does well in a glycin developer. But it's nothing like other warm tone papers.

I didn't know Bergger changed their formula. When did that happen?