The difference will depend how you perceive it, at the moment when you're about to sesh again. But regardless, science has your back as far as tolerance goes.
From studies i've read, and i'm sure its pretty much common sense to us, is that tolerance of marijuana is counter-intuitive. Meaning less pot use = more high you get when you do use it. (didnt need me to tell u that lol)
Therefore, science/objectivity is on your side, by smoking less you WILL have a much weaker tolerance. And for the rest? That's up to you and your expectations
After a month break, you'll stop taking pot for granted during your time off and it'll become much more precious. You'll probably be itchin' to get baked, and the longer you go the more intense it'll get (well the first few days are bad, but it gets better. But i mean you know and love it, your not going to all of a sudden hate marijuana - so you'll eventually be craving it psychologically when the break is nearing its end. That's me anyway). For the most part, this is great and you truly look forward to getting baked, and because of those expectations (concerning tolerance, being excited, amount of time passed etc), you will be effected even further so.
Completely disregarding tolerance, simply your expectations and mental sets/schemas affect your high. This explains not only "buzzkills", or being caught in overwhelming situations when you shouldn't be baked, but also, when your excited to get high you tend you have a better experience - than say getting high to put an end to a shitty day. And thats disregarding any breaks, or any change in tolerance itself.
And another note - tolerance can be not only of the chemicals, but tolerance of the environment and situation your in. If you get high somewhere new, or in a situation your not normally high, or even with new people - you're not changing your chemical tolerance, but you'll sure as hell feel
different. Essentially, over time you become tolerant of your behavior. By changing your behavior (taking a break) your changing what your body is tolerant of. You'll be tolerant of being sober - or whatever behavior takes place of pot smoking/vaporzing.
Can't say much about the time issue (1 month compared to 6) other than the fact that, the effect will increase. I don't know how long it takes the body to 'get weed outta the system' and how it relates how how much you smoke and how often. Of course, at the far end of this spectrum (away from tolerance) is that you can only reduce your tolerance so much. After a certain period of time, it won't matter how long you wait.
I mean, even though 6 months compared to 1 month break is huge, the comparison from 1 month break from no-break will be quite great. In other words, you won't know what you're missing (until you take a longer break than 1 month, then compare it). If you feel like your tolerance isn't as low as you'd like when you start again, just take another break before your tolerance builds.
Essentially, after any lengthy period of time you'll have a low tolerance in many different aspects, as a noob stoner would.
Like the good ol' days. Remember those?
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).
. So a break is pretty much necessary for me at this point...and for other reasons as well.
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Just thinking about that first sesh after the break is enough to keep me going though.