Tube screamer input and output buffers

[POTL]

The Screamer has input and output buffers based on transistors
In modern distortion pedals buffers are generally not used, all of a sudden it dawned on me that you can opt out of these buffers.
As we know from the theory of the buffers have a gain coefficient equal to one, and therefore does not amplify the signal, so they do not make changes to the sound.
For myself, I made two assumptions:
1) They change the input and output impedance
2) This is the inheritance of the buffered bypass
The article anatomy Screamer I read that the input buffer improves work with wah pedals, but because the rest of the distortion pedal with no buffer at the entrance of great friends with wah pedals.
I would like to ask experienced people that will remove if bhodnoy and output buffer, what are the pros and cons I get.
I know that there is a scheme called son of Screamer, but I had never been heard live and was not able to compare with the original

[Renegadrian]

Yeah you're right in basically all your sentences...I have built some, the son of screamer is good but it lacks some volume to my ears, while the buffered version has a good volume. Last one I built!?
Just in between!!! Only input buffer!!! you can look at the mxr zakk wylde zw44, basically it's just another sd1/ts variation with only input buffer...it's enough to me...

[thermionix]

I also prefer to have the buffers, but the Son of Screamer sounds really close to a stock TS808.  To me it's just a slight difference in feel, mostly on the lower notes, due to the impedance differences I guess.  Maybe some phase thing in there too.  I don't rule out that it's just my imagination, it's a very small difference.