I don't get too excited about glue brands. I buy CornerWeld because it is easy to use, made for the purpose, and my supplier delivers it conveniently.
But in my limited experience, all of the modern wood glues will perform well if they are used properly. None of them is far superior to the others for our purposes in joining frames together.
When a properly mitered glue joint fails, it is almost always for one of these reasons:
1. The strength of the glue bond was compromised during the first minutes after joining. That usually means the surfaces moved, disturbing the just-beginning-to-dry glue.
2. The glue joint was "starved". That is, the wood absorbed so much of the glue's moisture that there was too little of it left between the surfaces to make a strong bond. Pre-gluing very porous wood prevents this quickly and easily.
3. The wood fibers separate. This happens over time, especially with radical expansion/contraction cycles or other fast/frequent environmental changes. In this failure, wood fibers can be clearly seen on one or both of the glued surfaces. The glue didn;t fail, the wood fibers did.
4. Unusual impact or twisitng force, which exceeds the strength of the bond or the wood.
Glue and mechanical fasteners are both essential to srong mitered corners. Glue or fasteners alone would hold the corner under normal circumstances, but circumstances are not always normal.
Glue keeps the corners strong and tight. Fasteners serve to hold the mitered surfaces still while the glue dries. And later, when the bond fails (see above), the fasteners prevent catastrophic failure; they at least keep the corner from literally falling apart.
I always use both.