ASI 174 mini vs ASI 174mm

The ASI 174MM is more suited for OAG's mainly because of the larger chip than most mini's and the pixel size helps a lot. The standard is made for speed with the same sensor and all, but more specific for lunar and sun imaging. To be honest I would go with the standard version. I could use her for guiding and imaging, but all depends of the OAG itself. Mine (the old one from ZWO the M68-L works in two configurations, so it won't be a problem.
But this is my case. But like I said, the choice falls under the OAG that is used and if you want her only for guiding.

Regards,

Cesar

I agree with those who vote for the mini. The sensor is the same on both but achieving focus with the standard version will be hard if not impossible depending on the distance to your imaging sensor. The mini is flexible and can be moved much closer to the prism if needed.

Edit: The non-mini has better FPS, but this difference is only a matter of importance for planetary imaging, not guiding.

Thanks all for the insight -I have the Celestron OAG  and the asi585 for planetary imaging 
I’m going to go with the mini

Tareq Abdulla:
Nice question, and it is about OAG, so same question but for a guide scope not OAG, will standard be ok then? Not necessary better but at least it is working, i have ASI174MM standard and i am not willing to buy it again in mini version, maybe another model but not 174, so i was thinking if i can use the standard with nosepiece with a regular guide scope or a finder scope converted for guiding.

On a guide scope either would be equal. Because there you aren't dependant on matching the distance to your imaging sensor.

I see, great, so then i won't force myself buying mini version for all scopes if i won't use OAG for all, thank you

Monty Chandler:
I don't understand the question.  They have two very different purposes.  The mini is a great guide camera. The mono is not designed for that.

Well, both are mono. Not sure what you mean.

in general:

I have the 174 (not mini). It is an excellent chip. If you use an OAG, the Mini is a must, because as mentioned above, you won’t come into focus with the normal one in most OAGs. That must be checked in advance.
If you can go with the „normal“ one, e.g. guiding scope, it is an excellent camera not only for guiding, but also for solar or any lucky imaging, because it has an global shutter, which is extremely rare, but important. So if possible, go for the „big“ one. 

CS
Rüdiger

Do you have zero interest in using the 174mm for planetary? Seems like a waste of a good planetary camera (I know you haven't bought one yet) but the 174mm would be an awesome planetary camera for mono imaging?