Differences is in Terms.
Baton Sinister. A baton that is from left to right. Usually denotes illegitimacy.
James Scott 1st Duke Monmouth 1st Duke Buccleuch 1649 1685. James I King England and Ireland VI King Scotland 1566 1625 Arms differenced with a baton sinister argent overall an inescutcheon of pretence of Scott Arms.
Charles Don Carlo Fitzcharles 1st Earl Plymouth 1657 1680. James I King England and Ireland VI King Scotland 1566 1625 Arms overall a baton sinister vair.
Charles Fitzroy 1st Duke Southampton 2nd Duke Cleveland 1662 1730. James I King England and Ireland VI King Scotland 1566 1625 Arms overall a baton sinister ermine.
Henry Fitzroy 1st Duke Grafton 1663 1690. James I King England and Ireland VI King Scotland 1566 1625 Arms the whole debruised by a baton sinister compony of six pieces argent and azure.
Richard Neville 5th Earl Salisbury 1400 1460. Neville Arms with a label compony of Beaufort for difference, to signify his junior status as a son of his father's second marriage to Joan Beaufort, a legitimised daughter of John of Gaunt. Source.
On 10 Jul 1759 Catherine Blount Freeman 1737-1759 (22) died of a malignant fever. She was buried at St Andrew's Church Wimpole. Armorial Yorke Arms differencede with a crescent to indicate son of the current holder; her husband Charles Yorke 1722-1770 (36) with an inescutcheon of Freeman Arms quartered with unknown arms two lions passant guardant with a bordure engrailed.
Stylised sarcophagus in white veined marble, bearing a white inscription panel; above is an urn in brown marble against a grey background standing on a base of three steps around which are grouped three putti: two garlanding the urn while the third stands by in dejection with reversed torch; in front of the steps is a portrait medallion and at the base of the sarcophagus is an achievement of arms; signed 'JAMES STUART (46), INVT. PR. SCHEEMAKERS (68), SCULP. MDCCLXI'.
Esme Stewart 1st Duke Lennox 1542 1583. Quartered 1&4 John Stewart of Darnley 1st Count Évreux 1380 1429 Arms, 2&3 Stewart Arms a Bordure Engrailed gules for difference, overall an inescutcheon of Lennox Arms the heiress of whom was Elizabeth Lennox Count Évreux 1370-1429 wife of John Stewart of Darnley 1st Count Évreux 1380-1429. Source.