One major difference is during the first term of Trump he was above water on the economy. There was backlash in 2018 because people didn’t like him. Now, not only do they not like him, he is way under water on the economy.
The best part about this is, the Texas gerrymander relies on Hispanics staying red but all elections since Trump have shown Hispanics have gone back to Democrats. Republicans not only may not gain seats in the Texas gerrymander but could lose them.