Every component makes a difference, and all other things being equal, the less engineered the component, the greater the potential magnitude of that difference. And if a difference exists it must exist in some amount and if it exists in some amount it can be measured (in theory). But in measurement we have noise (a metaphor in most cases of measurement, but literal fact in music/audio), which all too often means all bets are off when it comes presence of a wood-related difference versus the measurability of that difference and the importance of that difference. As the old scientific statement goes, 'not everything that can be measured is important, and not everything that is important can be measured'.