The Crystal are made out of LSR (liquid silicone rubber?) vice PTFE (polytetrafluoroethylene...it's a plastic), so it doesn't have the same forming properties of the XELASTEC tips, but they do retain the same amount of grip. Additionally, the shroud on the XELASTEC tips surround the outer perimeter of the nozzle a bit more. They'd be a better bet if you're looking for something with good deep insertion properties; the Crystal seems better suited to just block the ear canal vice fill it.How are the crystals different to the Xelastec tips? I've ordered some Mifo foam tips which are compatible with the Jabra's, because the Xelastec are getting stuck in my ears when removing the earphones. Easy enough to remove, but not something I want to keep doing.
I was planning on buying the new Sony XM4's, but I'm damn happy with the sound change.
Pretty sure I have the same Mifo 85t tips. Word of caution: careful when you're stretching the tips around the nozzle; that foam tends to tear pretty easily. Luckily, the seller was willing to replace the foams I tore during application, but can't say that'll be the case every time.
Additionally, the XELASTEC are a standard 5mm ID bore vs the Crystal TWS' more, well, TWS-friendly 3mm (I think...it's skinny enough to work with the original Noble Falcon and Jabra EA75t).
Crystal:

XELASTEC:

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