Photon Bee is superior to Cobalt Bee, It not only boosts your bee attack by +1 and doesn't need rest, it has above average stats and a great ability, 'Beamstorm' which not only collects all the pollen in 40 patches but also doubles the amount you acquire, well Cobalt Bee and Crimson Bee is just a bootleg Photon Bee. Why? The way I understand the Pulse abilities is basically a Beamstorm but it jumps from the bees of its own color as it gets more powerful each hop. Cobalt Bee is better in my opinion if we consider the pricing but the Photon bee should be removed in 2 months or so as stated in the discord, but if you want don't want a downgrade (not a downgrade if you own both) I say go for photon, but that's just my opinion, as you don't need the 4 attack from them as Lion Bees get the job done better.
I’m guessing you already have Crimson then? If not get those 2, since they’re overpowered in the bomb department and boosts etc. You could always get photon first if you’d rather, since this choice is a personal preference and that these bees have no leaving date- so you’ll get them 2 eventually.
I prefer Photon than any other event bees, really, so I recommend getting Photon, because of its powerful Beamstorm move and its infinite energy.
It’s better off getting the Photon Bee considering it gives you haste and beamstorm, a beamstorm is a powerful secret weapon, it shoots 40 BEAMS at once. It does not need to rest. Also with the gummy bee, gumdrops, and Photon Bee makes a whole mega combination. Even just gumdrops and Photon Bee if you don’t have a gummy bee is still overpowered. Just get the Photon Bee.