I mean, you don’t really have to tell them. The scars are super minor, especially for glassies (x series). If you get a vibe that your employer might be a conspiracy/mark of the beast nutjob, might be better to keep quiet. Otherwise, I’ve only really had good reactions to mine. For a lot of employers, especially if you’re in a tech field, I’d say it actually increases your chances. Keeps you memorable. Honestly wouldn’t worry about it.
So, for this, ignoring the actual capabilities of the chips (you said besides the obvious) I’d sort them into two categories. x series implants, and flex implants. I’m sure you know that x series are glass capsules installed with a pre-loaded syringe, and flexes need to be installed with a scalpel or a large piercing needle. As a rule, flex implants get much better range than x series, regardless of type.
For x series: from anecdotal evidence talking to those here, I’ve heard the xM1 has worse range than the NExT, by a small margin (for the HF/13.56MHz side obv, since xM1 has no LF like the NExT).
For flexes, part of it comes down to the antenna type. the flexM1 currently uses the “wedge” style antenna, which has fairly excellent range. The new type of antenna, which is used on the flexDF2 and the flexMT AFAIK, supposedly has somewhat lessened range, according to anecdotal testing by @Eyeux. Again, not a huge concern (probably wouldn’t notice it in most applications), but it might be a slight reason to go for the flexM1 at the moment, if it works for your use-case.
My cost was $50 per implant, but he made me a cheaper deal for 3 (won’t share exacts in case that’s changed, he doesn’t advertise prices). AFAIK $50 each is on the cheaper end of the spectrum, I’ve heard some in the US charging ~$100 per implant, for x series that is. For flexes, I’m not sure, but expect it to be higher. It’s a much more skilled affair, and requires more supplies and time on their end. Regarding pineapple, I’ve always heard very good things. Here’s some posts talking about him:
I’d recommend DMing Ottomagne if you want more detailed info on their Pineapple experience, but again, heard nothing but good things.
For his specific prices, I’d honestly just reach out, seems like a nice guy.