You’re asking for a definitive determination, based on an opinion? I use the Corona Mini, so it’s clearly better! Both are good. But because of the TonePrint availability, I think it’s more flexible.
I started with the boss ceb3 however after looking at so much there’s a few reviews that say the mxr is too subtle where as the corona can always be altered via Toneprint editor if it’s subtle... I like that idea a lot.
The TCe Corona (larger version no the mini) has the tone print option which makes it very customisable, plus there is some software available to tweek and twiddle. I had one for many years and I only recently dropped for a Strymon Mobius. I love the CE-2 tone print and the fact that it is stereo capable too. I like the clarity of the chorus and that it can sit in a mix and add a subtle sizzle without dominating but still be heard. It can do the heavy chorus too but I liked the more subtle stuff. The MXR is a slightly different beast. There are no options other than it's baked in sounds but they do sound good. It's more of a modern sounding variant on a classic Chorus sound and it's got the option of the flanger. I like the Xover function for effecting only the trebles and mids (sadly missed on the TCe unit) and I like the bass and treble controls, that's a sweet feature. It's also an analogue chorus so it sounds a bit fatter and punchier than the TCe. Neither are better, just different and tailored differently. So there's no wrong choice here, just personal taste. It would be wise to demo both but no harm in taking a blind plunge either.
I loved my MXR micro chorus. I'm sure th TC is infinitely more flexible though, although I have no direct experience with it.
I don't have any direct experience with the Coron (only via MS60B sim), but I did own the MXR BCD. I did like it and the flanger option is a real-nice-to-have, but ultimately found it a bit too subtle for my taste. I much prefered the MXR Stereo Chorus.
I haven’t tried the MXR, but I love my TC Corona. It’s been on my board for over a year and is going nowhere.
Bass Chorus Deluxe or the Analog Chorus? I guess it doesn’t matter because I liked both more than the Corona.
I'd vote for the MXR. I've never owned it but I did own the TC Corona and I couldn't make it pop in a mix, no matter what I did. I tried it it in a blend loop, I tried it with OD before and/or after... It was completely useless for my purposes, and I don't understand how it works for other bassists. It sounded pretty great on guitar though. The toneprints for electric guitar are significantly better than the bass ones, imo