Should I use T-track or miter slot for the long section parallel

Should I use T-track or miter slot for the long section parallel miter slot track Our Miter Slide – Type 30 T-Track is a versatile and durable accessory for woodworkers, DIY enthusiasts, hobbyists and professionals miter slot Veritas Double T-Slot Track From: $ Choose an option to view item availability Length: Choose an

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miter slot bar miter gauges with or without T-slot Slides into miter track or miter slot on your table saw and can be used on table saw extensions, drill press tables &  I have a multi purpose workbench that has a miter slot that's about 38 deep and 34 wide A gauge I bought for it did not fit because the bar