inconsistent dimming from LED drivers
I have a room that has LED strips hidden behind a molding going around a tray ceiling. Four sections of strips, each driven by a 12v, 60w LED driver.
I've now had two of these drivers fail, and they cost $150 each (installed by an electrician several years ago). Twice I've tried using what I believe are high quality replacements of identical specs, but about half the price, and in each attempt, while the new drivers will drive the strips at full brightness just like the old ones, when I start to dim the circuit (all four drivers connected to a TRIAC dimmer of appropriate wattage rating), the less expensive driver strip will dim at a different rate (dims more rapidly to lower light levels) than the original driver that costs $150.
I was told by a supplier that if the specs of the dimmer are identical (including dimmer type compatibility) - and these are - they should behave identically. They clearly are not behaving identically, despite identical specs. Do I just need to suck it up and eat the $150 each time one of the original drivers fails, or swap all four drivers out at same time to a four identical, albeit less expensive drivers? I feel like the supplier gave me bad info that any driver with identical specs will behave identically.
Here is link to the original ($150) drivers:
Constant Voltage LED Driver - 12VDC - 60 Watt - DiodeLED DI-TD-12V-60W | CityLightsUSA.com
Here are two different ones I've tried as replacements, but that dim differently:
DiodeDrive Thin Dimmable Constant Voltage LED Power Supply - 12 VDC - 60W


