The amber turn signals and the red taillight units have the 9 LEDs on the end of the unit, and they have 6 LEDs shining to the sides below that, so they "fill" the reflectors pretty well. The mini white marker lights all shine from the end, and so they are more directional. The reflectors on the xA for these are somewhat directional to begin with, so the LEDs are now a bit more directional.
As others have mentioned, the blinking speed is done on purpose to tell you when one of the bulbs is gone -- and it is ~2X as fast.
I'll check which flasher I need -- the one for the "newer Toyotas" is $13, so I'll probably buy it...
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