Endeavor pays all of their payscales an extra $22,000+/year. Unless you really wanted to live in a Compass/Skywest only base for less pay, you are talking tens of thousands of dollars less at those companies versus Endeavor. Basically, Compass/Skywest raised first year pay only, while Endeavor raised all of their payscales a significant amount more than Compass/Skywest raised their first year by. This equals compounding earnings, year 2 and beyond.
Add in that Endeavor is adding airplanes, has hundreds of pilots with guaranteed slots at Delta and that the Compass flow is over, I would pick Endeavor over Compass if I were making a leap to the regionals right now.
I would be suspicious of pilots stating otherwise, since their motives may be to get you in a seat behind them, so they can secure the staffing needed behind them so they can upgrade. It's an unfortunate truth that is occurring now with the regionals struggling to staff their airlines and something prospective new hires will need to shift through the noise to see the reality of what they are getting into.