Coils are much more complicated than just resistance. First, the two secondary figures you mentioned, taylor at 4.7, and your BW at 9.83 ARE INCORRECT
Look carefully at your meter. I have no idea what you have, it may have an "auto" (automatic range) function, or completely manual range. in the same way that the voltage goes up in steps of range, so does resistance measurements.
The Taylor you mentioned, if 4.7 is the correct DIGITS, will be 4.7K, or in other words 4700. K means thousands, (not the fraction thousanths) and M means Mega or millions, so say, 4.x M ohms means 4.x MILLION ohms.
So your meter may have resistance ranges of something like 1000 (zero to 1000 ohms, or 1 K) 10K or more (zero to 10,000, or 10K, with better accuracy above 1000 ohms), then 100K, and on up to 1M for 1 million, etc, etc.
Same with your BW coil. It surely must be 9.83K, or 9830, or nearly 10K or 10,000, in round numbers.
Generally, lower primary resistance means the coil draws more current, makes more magnetic field, and is capable of making higher voltage spark.
Generally, the lower the primary, and the higher the secondary means higher voltage output. This is known as a "high ratio" coil, a term which you may run into.
BUT THAT is not the real story. Coils have a magnetic core, and beginning with such systems as modern epoxy coils and the GM HEI, engineers began to experiment and develop better core materials, as well as stuff like the GM "E core" meaning the shape of the core.
These things affect the way the magnetic field is formed, collapses, and generates the spark.
It is important to make sure that whatever combination you have IS COMPATIBLE with each other. Research your ignition system, whether Mallory, MSD, HEI, or whatever, and make sure that the coil you have employs the proper ballast resistor IF NEEDED
In my particular case, I'm running a stock Mopar factory coil driven by a GM HEI module, with no ballast. I started out with short runs, monitoring coil heat "by feel." After I got past an hour or two, and finally one hot summer day of nearly 3 hours of almost continuous running, with no excessive coil heat, I decided "all was good."
Multimeters, used to be called "a VOM" for volt - ohm - milliameter, have all kinds of different ways of changing ranges. Here's a photo of an old standby, the "famous" Simpson 260
If you look at the very top "ohms" scale, you can see that on the far left it goes to 2K, or 2000 ohms
This scale is selected by "R x 1", and if you select "R x 100" you multiply the scale by 100, so the top reading in that case s 2000 x 100, or 200,000, or 200K. I've never understood why these were so well liked, because the scale selection was just plain crappy. On this meter, you would be forced to use the "R X 10,000" scale for the secondary, so on the top scale, 9.83K of your BW coil would be WAYYY down at the right between the 2 and the 0. (2 in this case would be 2 x 10,000, or 20K, so the little mark halfway between the 2 and the zero (far right) is 10K, or 10,000 ohms. Like I said, crappy.
When I was in Navy electronics as a young man, THAT is what we had, along with a "PSM-4" which in my opinion was a much better meter.
Here is just a random digi multimeter I Googled up. It is strictly manual range switching, no automatic ranging
Notice that down at the bottom of the switch it says 200, then going CW around the switch, you have 2K, 200K, and 2M
So you would start at 200, and if that is out of range, go up until you get a usable reading. In the case of your coil primary, you would be on 200 (up to 200 ohms) and for the secondary, you would end up on 20K--(up to 20,000), and your BW coil secondary would SAY 9.83, but because you are on the "up to 20K" scale, that would mean "9.83K" or 9THOUSAND ohms, or in other words, 9,830 ohms
In the case of the Fluke 70-series like this 73, the range switch is the button in the center of the switch. You put the switch in the ohms position (upside down U for Omega) and to change ranges, you keep pushing the button until the range is where you want This meter can "auto range" so if you just turn it on, and to the correct function without touching the center button, it will "seek" the correct range. Fluke, by the way, are excellent meters.