Here are all the changes Apple has made from the original HomePod to the HomePod (2nd generation).
Apple HomePod v HomePod Mini: Which is the best HomePod for you
Old vs. New HomePod Buyer's Guide - MacRumors
Apple HomePod 2 vs HomePod: Is it worth upgrading?
Apple HomePod 2 review: A stellar but pricey sequel
Hands-On with the HomePod's New Intercom Feature, Alarms, and Siri Tricks - MacStories
HomePod 2 wait times stretch out until March
The Apple HomePod is back, with new smarts, and a lower price
HomePod mini vs HomePod comparison - 9to5Mac
Buy HomePod mini - Apple
Yibracki Wood Table Stand for HomePod 1 and Homepod 2 Speaker with Dust-Proof Cover, Anti-Slip Wooden Desk Stand Compatible with Homepod 1st & 2nd Desktop Tripod Stand Holder, Black : Electronics
Apple HomePod vs HomePod 2: which is better?
Apple HomePod 2nd Generation Review - Tested by Experts
Buy HomePod (2nd generation) - Apple