"But you have to distribute all your retained earnings as distribution through K1."

There is no Have To Distribute condition. It is a pass-through entity type, so all taxable income for the S Corp is reported through to the shareholders every year. That has nothing to do with distributions. Heck, you could even be distributing funds from multiple prior years, in just one year, and that has no impact on taxes, since the funds being distributed have been reported all along.

Have you read the other topic you already have running, here:

https://accountants.intuit.com/community/proconnect-tax-discussions/discussion/re-is-it-allowed-that...

And you have posted your questions under various software forum subgroups. This one is for using Lacerte. Your other one is for using ProConnect. These forums are for "how to use" the programs. It helps to ask questions about specific software in that software's specific forum.

There is a subforum for Tax Talk, too.

But what you won't find here is Educational Resources. No one here can teach you how to "do" a tax return. You need to find resources outside of a software users' group, and keep up with changing regulations and current rules. I know you've been provided with resource links for DIY.

"Are there any other factors to be included for this comparsion?"

Probably at least 30. This is why not everything is DIY. Perhaps you want to find a mentor in your area who will have you work for them while reviewing with you the specifics of all the questions you have.