Surge is a Korean board design half-bridge design, Taramps is a full bridge design. I have run both. The Surge is definitely a more robust design, but watts is watts in the end. Will be selling an extra Surge 2000.4 $395 shipped to the lower 48 if anyone is interested. Will probably list it this weekend. The surge amps are very well made, clean power, low noise floor amps. Mot Korean board design/built amps are. The Taramps, is a full bridge "Brazilian" design that is great too. If you're considering a fullbridge monobloc, then the Soundigital EVO5, EVOX, EVOX2 or the EVOPS (what I'm running currently) or the Tatamps SMART/SMART BASS or BIG BOSS units are worth a look. Quality full bridge designs are every bit as good as their Korean design counterparts. Truth be known, some of the earlier RF and JL are full bridge amps still in production today. The future is in GaN fet technology amplifiers (GaN 3 Gallium Nitride Powered Class D). Tiny boxes, loads of power. Check out this tiny 11.5x5x2 168x8 Soundigital GaN fet amp with a SNR of 114db!
https://soundigitalusa.com/products/2000-8-gan/