Abbreviate LD BETF as laddered bond ETFs.
'BETFs that bound maturity' are UNladdered but impose a maximum limit on maturity of bonds, which I denote Bound BETF, and abbreviate as BD BETF.
This question presumes an impending increase in interest rates. I recognise that an unbounded, typical ETF can hold bonds of 20+ years to maturity (cf XCB, XGB), which both LD BETFs and BD BETFs don't hold.
However, how much do LD BETF differ from BD ETF? They seem more similar because albeit unladdered, BD BETF must still buy new bonds continually after old bonds expire. For example:
1.3. iShares 1-5 Year Laddered Government Bond Index ETF (CLF)
(Unlike BMO, iShares does not offer separate ETFs for federal and provincial bonds)
1.4. BMO Short Federal Bond Index (ZFS) & BMO Short Provincial Bond Index (ZPS),
whose maximum maturities are 5 years.