To decide if the spectrophotometric capabilities of the plate reader are sufficient, you will have to decide on the operational parameters you require for your analyses, such as wavelength range, baseline stability, temperature control, linear range of absorbance measurement, and wavelength resolution.
The built-in heater (can set the temp from RT to 65°C) allows for elevated temperature assays. He recently performed a multi-hour kinetic assay which required a constant 37°C over the time of the assay, something which previously would not have been possible with other readers. Additionally, the integrated shaker has proven VERY useful at decreasing variation in materials which might be aggregating or settling. By creating a shake step before the read, we can ensure that materials are uniformly dispersed when taking our reading, reducing the CV from run to run. Other things of note, the carrier tray is now machined metal instead of the plastic in the original Epoch. They still utilize the same strobe lamp system, which allows for the instrument to remain on 24/7 without worrying about lamp life.