Look at the numbers on your QCTP. These are the equivalents to Aloris
Piston Type
250-100 = AX
250-200 = BX
250-300 = CX
250-400 = C
Wedge Type
250-111 = AXA
250-222 = BXA
250-333 = CXA
250-444 = CA
250-555 = DA
The holders for wedge type & piston type are the same. No one uses the Aloris piston designations anymore so just search for the wedge designations, AXA, BXA, etc.
For Phase II & generic China holders you can also go by the last 3 numbers. 100 series for AXA, 200 series for BXA, 300 series, for CXA, etc.
Generally different brands should fit as they follow a standard for the dovetal size & tool slot. You can possibly run into fitment issues but that is a result of quality issues with cheap stuff. I mostly use China holders with my Dorian SQCTP & have never ran into a fitment issue but people have had issues.
If you buy holders from Shars, they now sell 2 different types which are not interchangeable depending on the tool post type. Their ebay listings will show the difference. They are the only ones I have ever seen to sell them like that.