The 29-year-old scored twice after Jamie Mackie had put the hosts in front by the 18th minute following goalkeeper Sam Johnstone’s howler.
Adomah equalised from the spot late in additional time of first-half, before latching on to a pass from Conor Hourihane by the 54th minute to score the winner.
"I think we were better. There is a better spirit, a better attitude among them. We have a bigger hunger and desire to achieve," Bruce was quoted by Birmingham Mail.
"The squad is far better in my opinion than it was 12 months ago. We have a lot of young players busting a gut. I have seen it earlier in my time here when we go away from home and pack in.
"To be honest, when they scored, I was very pleased with the reaction. I thought we looked a very, very decent team, especially up the front end. We were a threat and the young two forwards Keinan Davis and Josh Onomah were excellent.
"Then we had the trickery of Albert Adomah and Robert Snodgrass which is great to see. Fair play to Albert Adomah, he’s got seven goals already from wide areas and he’s done very well," he said.
Adomah was dropped to the bench in the early embers of the season and Bruce revealed the Ghanaian reacted to his lack of game time.
"The start of the season he wasn’t in the team. He didn’t moan or groan. He came into my office and said ‘I will prove you wrong'.
"He trained hard, got his chance and has taken it. I never thought I would see him playing on the left, but he’s done it for Bristol and he looks very comfortable there. We’ve got modern wide players, a left-footer on the right and a right-footer on the left. It seems to be the way it works," he added.
Villa have moved to fifth on the log with 29 points, nine points behind leaders Wolverhampton Wanderers and will host Sunderland next weekend as they hope to make a return to the Premier League next season.