Bad News Tour was released a year before Spinal Tap (which was, apparently, in production at the same time as Bad News Tour).
Spinal Tap is a much more "polished* production, and the “Stonehenge” scene is priceless. On the other hand, I like the low-budget look of Bad News Tour. I always get a chuckle out of Nigel Planer’s (“Den Dennis”) confrontation with the cafeteria woman. ("Sausages!)
One thing I noticed about Spinal Tap was its depiction of audiences. I worked at Edwards AFB when it came out, and one of my co-workers was in a metal band (Redline). In the film, the gig at the air force base showed people just standing politely around. My experience was that when Redline played at EAFB, the audience rocked. They were all out dancing. When they played the Antelope Valley Fairgrounds, people just stood around.
As for Bad News Tour, I thought Nigel Planer’s character was a bit to close to The Young Ones “Neil”.