I have never tried fresh mushrooms, for the reason of more bulk to consume.
I find it easier to consume it without all the water weight.
There are lots of factors determining potency of a trip. If your mushrooms are form multispore inoculation, they will vary from fruit to fruit.
Also if you ingest them on a empty stomach, or with food or on a full stomach matters aswell.
Sometimes they are taken with lemon or orange juice and this is known to boost potency to a new level.
MAO inhibitors also make the trip last alot longer. If you are taking medications that contain them.
weight aswell, people tend to forget to weigh out their doses, and think a fruit body of the same size of last time will be the same weight, but infact some fruits will be hollow and some will be meaty. its almost impossible for us to feel a difference of 1-5 grams in the hand.
I do belive you that fresh mushrooms might make you trip harder, but these trip reports would have to be very controlled for the results to be conclusive.