HAPPY THANKSGIVING oh Canada! But I’m rooting for the Seattle Mariners (and Seahawks).
So what to expect going from a 9’ single hand fly rod to a 10’ 7wt? As backstory to my POV … when I was teaching myself how to fly fish 30 some years ago I read “Striper Moon”. That book was much about using Salmon fishing techniques for Striped Bass fishing (Anadromous fish). It was also about the utility of using a longer rod (10 foot plus).
In short (unintentional pun) it makes way too much sense to use a longer rod when wade fishing. For starters your back cast is more likely to stay off the water (fouling) … and line control (mending, swinging drifts) is “easier” because the leverage (length of the lever) is greater.
But for comfort in casting you might want use a heavier in weight fly reel for counter balancing the longer and slightly heavier fly rod (like an Islander reel instead of a Danielsson). And in casting fly line you might want to line “up” from a WF 7wt to an WF 8wt … because you have more fly rod to load. A major caveat being, one always has to dial in fly line type & grain weight to a specific fly rod.
In my fly fishing experience at my local river I’ve used (throughly enjoyed) 10ft 7&6wt fly rods 75% of the time in over 3 decades of fishing. Currently (as my Avatar shows) I’m using an 11ft 3wt Trout Spey rod in a single hand fashion. It‘s equivalent to a 10’ 6” 6/7 wt standard single hand fly rod. When I’m not using that Switch rod I’ll have a 10’ 6wt Sage XP fly rod in my single hand.
I hope this helps in your fishing quests.