Based on measurements by user <tripelo>, analysis for A-C Y10-7-13 can be found here (see chart below):
F/B Ratio on Ch10 is only about 13 dB. [W-G YA-1713 isn't any better.]
ATSC A/74 "Guidelines" established 33 dB U/D (Undesired/Desired) Ratio as the point at which a strong Adjacent DTV Channel would begin to cause noticeable interference. In FCC OET 2007 Tests of then available DTVs & STBs, the range of performance was between 33-40 dB U/D Ratio. Mar 2007 Specs for CECB's (Coupon Eligible Converter Boxes) REQUIRED meeting the original 33 dB U/D "Guidelines". In FCC OET Oct2007 Tests of then available CECBs, the range of performance was between 40-45 dB U/D Ratio, which SHOULD be "typical" for some 2007, many 2008 and most (all?) 2009+ DTVs & STBs.
If your Tuner provides interference rejection at the 40 dB U/D Ratio, and there is 13 dB rejection up front in the Antenna, then it will begin to notice visible interference when TVFool calculated receive signal levels are in vicinity of 53 dB U/D Ratio....and since you'll want to have another say 10+ dB of EXCESS signal level to deal with Multipath Fading, in "Theory" you should have only rare problems with 43+ dB U/D Ratio. Since TVFool calculates 26 dB U/D Ratio between Ch10 and Ch9, you have a Theoretical "Margin" of 17 dB....which "should" be adequate to deal with daily and seasonal variations....and might be marginal or deficient with older DTVs.
A SINGLE Antenna (smaller than a car) can't be built which will significantly attenuate the ADJACENT Channel with minimal degradation to the Desired Channel. TWO Identical Antennas can direct a NULL to the Rear via the Staggered Stacked Antenna Trick, but that won't work for Ch10 & Ch9, since they are NOT even close to 180-deg apart. And phasing two Horizontally Stacked Antennas to direct a NULL only works in a narrow FORWARD direction:
And of course, there are Hi-VHF Antennas with much higher F/B Ratios: [Sorry, fol. post only addressed Ch13 performance.]
Although an LPDA (Log Periodic Dipole Array) doesn't provide as much Gain as a Yagi, the F/B & F/R performance tends to be EXCELLENT. About the only Hi-VHF (Only) LPDA still available is the (professional) Wade WL7-13/S:
And some COMBO Hi-VHF/UHF models from Winegard, such as:
Or consider an Outdoor DIY Project with even HIGHER F/B Ratio, such as fol. LPDA with 48-in Boom: