The Pro provides CO2 levels, PPFD readings, and gives you spectral information. The first two are good if you need continuous monitoring but, unless you're building your own lights, I'm hard pressed to figure out why I'd want to a spectrograph when I can get it from the manufacturer.
If you're not using CO2, which is my situation, I'd go with the PulseOne and then put the money into a PAR meter. One, a separate PAR meter is going to be easier to use in day to day operations. Second, I read a comment on the Pulse site that the readings from the Pro are very dependent aligning the sensor correctly. In contrast, the SPOT ON and the Apogee both have a significantly larger sensor than the PulsePro and, while I can't substantiate it, I suspect that they build sensors that size for a reason.
Bottom line for me was - no CO2 so PulseOne + separate PAR meter = more usability.
The page at this link can be used to determine the accuracy of your PAR readings.
then she went to bed and we broke out the bong and just chilled and talked and listened to music and such. All around a very good time. It was the first time we had had anyone over so it was a special occasion for sure. Also, I haven't been on anything close to "first date" territory in 5 years so I'm all sorts of flustered now, especially since I've never *dated* a girl before plus autism so like, trying to be respectful and not screw up a friendship while also trying to figure out what I'm supposed to be taking as flirting vs just being friendly has got my brain going overtime 
