What were the attendances at both events?
Trump 5000/6000 Pence 250
I found this article on AZCentral.com in which it states about the Trump rally at Findlay Toyota Center in Prescott Valley, AZ on Friday, 22JUL2022 that states...
“People came from around the state and elsewhere, including Hawaii and California, to support the former president, nearly filling the arena set up to seat 5,800 people. Some people waited in the 100-degree heat for hours to get into Findlay Toyota Center, some filtered out early as the event stretched past 9:30 p.m.”
The Findlay Toyota Center wiki page states that it has a seating capacity of
6,200 (concerts)
5,100 (basketball)
4,810 (ice hockey)
https://en.wikipedia.org/wiki/Findlay_Toyota_Center
This means they had the arena pretty much packed pretty much to capacity.
As for Mike Pence’s rally in Peoria, AZ according to this article it states...
“About 300 supporters were in attendance to watch the former vice president describe Robson as the one true conservative in the nationally watched GOP primary.”
The result of the dueling rallies was that Trump dominated by a ratio of 20 to 1. This video seems to back up the claims of these stories.
https://www.youtube.com/watch?v=5bzzXJi8UTE&ab_channel=Dr.SteveTurley