Would be interested how you compare the razor with the Schick. I didn’t get great shaves with the blades that came with the razor. And found they dulled quickly. But the Parker really sung with Schick.
My comparison is the Parker is more mild, smooth and a little more forgiving then the Schick is even set to 5. I can certainly feel the blade in the Schick, in the parker I can't. My first use I didn't even think it was cutting and had to look closer in the mirror to make sure. I don't use the J1 much since finding DE's 5 years ago since it seems so aggressive to me. It was only used before to cut a week's growth and that always ended in blood letting because of the pressure I used equal to the twin disposables I was using at the time. Since it was my Dad's razor I only use it now when I am feeling nostalgic and thinking if him. Now the Parker may just change that and will likely use it more in my rotations with my DE's than I have been with the J1. The Taconic blades did surprise me in how smooth they were. The first and second shaves were quite nice the third left something to be desired but got a decent shave, will see in the future if it was just that blade or if they all lose there edge that quick. Last Monday I switched out the Taconic for a Schick and the first couple strokes I would have said I liked the Taconic blades more but then the blade smoothed out and would say they are about equal. I never noticed that before with the Schick blades in the J1. I have no clue how many shaves I got with the Schick's years ago but even though the Taconic's are cheaper I think cost per shave would go to the Schick blades because I estimated at least 15 shaves from them plowing down a week's growth versus 3 with the first Taconic blade.
I know what I say runs against accepted wisdom, but I had a rough first shave, removed the blade, stropped it on a bluejean leg, put it back in the injector, back in the Parker adjustable, and had a very good, smooth close shave. Of course, this is not a good controlled experiment, but this has generally been my experience with the Taconic/Persona injector blades in my Schick injectors as well, if I strop them before I load them the shave is a lot smoother. I know, it 's a hassle, but at least you get more shaves than the 2 or three customary with DE razors.
I also like the Parker injector a lot. My Schick G-1 still is my favorite injector, but the Parker is a great razor. I change my injector (and other blades) when they start to drag and pull. The last time I used the Parker, I got maybe 10 shaves out of a Taconic blade on my fairly coarse beard.
I was re-reading a few post and may have misinterpreted the comparison you were asking about. I was thinking razor and not the blade itself. Just thought I would let you know end of last month I did switch the Taconic out for a Schick blade and even though the Schick blade in this razor seemed rough the first stroke or two(never noticed it in the J1 before) it smoothed out and would say the blades are equal. I only have 2 shaves on the Schick blade as I went back to DE razors for the last month but since the Taconic seemed like it fizzled out after 3 shaves I am thinking the Schick will last longer. I might be using both my Injectors for the next week or two to get a feel for both of them before switching back to DE.
