Hales Transcendence 5’s slight discrepancy

I have and have had a pair of these speakers for 21 years. I had the crossovers upgraded and put in Seas Millennium tweeters. The speakers sound good but I notice that if up close to each speaker the right speaker sounds a bit brighter almost just subtly louder. When in my listening position I get a good central image and I only notice the difference between the speakers if up in front of each speaker. Is this normal or should both speakers sound identical. They are close but subtly different. They sound the same at my listening position. Is this normal?