There are companies that have tools on the market that do not do much advertising...but the cost of these tools (in my opinion) is not significantly less than anything else on the market unless you score an incredible deal from the shop or online retailer. My swag is that most people who maintain their own bikes don't put enough wear and tear on their tools for the brand to matter much. The counter-argument to this that some will state is that a low quality tool is most likely to break at the most inopportune time, and may damage what you are working on in the process. I don't necessarily equate price with quality...so buy quality tools that you need, at decent prices.
An argument for buying name brand tools like "Park" is should you decide to sell them down the road, you will most likely be able to get more money than an unknown brand tool.
If the mini crescent wrenches you have fit the jobs you are performing then go ahead and use them...there is not much wrong with that. I personally hate adjustable wrenches and much prefer using the correct size wrench for the fastener I am working with...but that is my personal opinion based on many years of experience.
-j