TenX offers more currencies (for testers at the moment), and with COMIT network they will be a swiss army knife for crypto payment. I didn't compare payment rates in details, so I don't know what Wirex charges in comparison, but TenX charges nothing on the customer side, just standard fees on the retailer side (like any card).

I also don't know when Wirex is converting your coins, there are conflicting infos on their website. Maybe you can tell me. TenX keeps your cryptos until payment, which is perfect.

Not able to beat TenX in any way in my opinion, but Wirex seems to be an ok competitor. You can switch anytime, no hurries. They won't go away.