Oh man. So, I bought both wanting to compare them. They're essentially the same. I guess it's like comparing Dukes Mayo to Hellman's Mayo--same product just slightly different.
Bulldog is ever so slightly thicker than Okonomi. It's got a "meatier" flavor--but again it's very slight and it could be a perceptive trick from it being a slightly thicker. The bottle has a different top, which makes it pour out in a thicker stream than the Okonomi. It's also a shade darker brown.
I suggest trying it if you ever see it around in your store!
As others have said, try Bull-Dog tonkatsu sauce: https://www.amazon.com/dp/B0002IZD1G (will be cheaper if you can find a local Asian store that sells it).
Red cabbage is fine.
What kind of sauce are you looking for? Like a traditional katsu sauce? You can buy this Bull Dog sauce on Amazon, not sure if that's an option for you. If not, here's a decent recipe to make your own.
Spam musubi - there's plenty of recipes online, but I go super basic. Plain white rice for the brick, sliced and fried Spam slices on top, nori to wrap it with a sprinkle of salt.
Tonkatsu - This recipe is close enough. Not very complicated, and very good with the correct sauce.
Kalua Pork is delicious as well, but I don't have a good recipe at hand.
https://www.amazon.ca/Bull-Dog-Vegetable-Fruit-Tonkatsu-Sauce/dp/B0002IZD1G
if i am not mistaken the brown drizzle should be this. as for the heat, im not sure.
If you haven't had this already, make sure to try it on there the next time!
https://www.amazon.com/Bull-Dog-Bull-Dog-Tonkatsu-Sauce/dp/B0002IZD1G
Your local Asian grocery store should have Bulldog brand ready-made tonkatsu sauce in bottles of various sizes.
https://www.amazon.com/Bull-Dog-Bull-Dog-Tonkatsu-Sauce/dp/B0002IZD1G
(Bulldog also makes a Worcestershire sauce; Worcestershire sauce is often used as an ingredient in Japanese cooking. And Kewpie mayonnaise will probably be on the same shelf -- you might also want a bottle of Kewpie to garnish your katsu with a little squiggle of mayo.)
Homemade tonkatsu sauce recipes vary a lot. Usually they start with something sweet (applesauce, sugar, or honey) plus ketchup and Worcestershire sauce, and sometimes soy sauce. And maybe a little allspice. Here's one simple recipe (this version uses oyster sauce):
https://www.justonecookbook.com/tonkatsu-sauce-recipe/
...I haven't tried her specific recipe, but JustOneCookbook has never steered me wrong in the past when it comes to Japanese-style comfort food.
Tonkatsu sauce is also called vegetable and fruit sauce
you can typically find it at any Japanese grocery store
Tonkatsu with Bulldog sauce!
I sweat a lot on rides, almost always ending up borderline dehydrated in the summer, so my go-to food post ride is as follows:
1 Full package of Ramen (I recommend the Nongshim Shin Raymun which is spicy as hell!)
2 Hot dogs, chopped
1/2 cup of 3-pepper and onion blend veggies
1 TBS butter
1 TBS Tonkatsu Sauce
In a pot, saute hot dogs and pepper/onion mix in melted butter until slightly browned. Add Tonkatsu sauce for the last minute or so. With the hot dogs and pepper blend still in pot, make the ramen in the same pot according to directions.
Generally takes about 10 minutes to make, and provides about 800 quick calories that are a nice blend of protein and carbs. The ramen broth will help rehydrate you quickly, and the extra sodium will help replace electrolytes. Add chocolate milk as needed to ease the spicy pain if you go with the Nongshim ramen (or just add it anyway, because!)
We use Kewpi mayo and this sauce https://www.amazon.com/Bulldog-Bull-Dog-Tonkatsu-Sauce/dp/B0002IZD1G?th=1 . It's great.