It's OW from the first one is the same as The Last Jedi from The Force Awakens. However, the obstacles are reversed, which will benefit BP2.
Both sequels were coming off of VERY popular and acclaimed predecessors. The Last Jedi had no obstacles at all coming in. However, despite high critics reviews, the WOM quickly became negative. I'm not getting into why, but let's just say that the issues it had came AFTER its release. So it lost a lot of steam compared to the first and didn't even have a 3.0 multiplier from OW.
BP2, on the other hand was reversed. It also followed a highly acclaimed film. However, the passing of Chadwick, controversies around whether to recast him as well as Leticia Wright drama created the obstacles BEFORE its release. Then it came out. Audiences have LOVED it. So let's look at the opening weekend numbers.
Both openings dropped about 10-12% (we'll have to see what BP2's actual numbers end up being). But here's the difference. The Last Jedi has a preview number of $45 million. It's overall opening weekend was 4.9X that number. And THAT is with the Christmas holiday beginning the following week for many. BP2's preview numbers were $28 million. It's OW was 6.5 the preview numbers. Sure we had Veterans Day, but that's not really a holiday for most people.
Let's also look at a comparison between BP2 and Strange2 (DSMoM). BP2 had a lower preview number but a bigger multiplier. DSMoM had 3 things that bolstered its preview numbers and OW. (1) It came off the heels of No Way Home. (2) It promised a follow up to Wandavision. (3) There were endless rumors/spoilers about cameos that people thought would be along the lines of Garfield and McGuire. What happened? (1) It had nothing really to do with NWH. (2) What they did with Wanda did not sit well with many. (3) the cameos were nothing and, quite honestly, kinda stupid and insulting.
I expect BP2 to have pretty good legs and should end up crossing $500 million domestic. In the end, it should end up with a decrease similar to Age of Ultron and The Last Jedi. However, it will end up much more respected.